7138665 has 16 divisors (see below), whose sum is σ = 12691200. Its totient is φ = 3807216.

The previous prime is 7138643. The next prime is 7138673. The reversal of 7138665 is 5668317.

It is not a de Polignac number, because 7138665 - 2⁸ = 7138409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26305 + ... + 26574.

It is an arithmetic number, because the mean of its divisors is an integer number (793200).

Almost surely, 2^7138665 is an apocalyptic number.

It is an amenable number.

7138665 is a deficient number, since it is larger than the sum of its proper divisors (5552535).

7138665 is a wasteful number, since it uses less digits than its factorization.

7138665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52893 (or 52887 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 7138665 is about 2671.8280259029. The cubic root of 7138665 is about 192.5479950040.

The spelling of 7138665 in words is "seven million, one hundred thirty-eight thousand, six hundred sixty-five".